51135401532 has 48 divisors (see below), whose sum is σ = 130690899360. Its totient is φ = 15489288192.

The previous prime is 51135401507. The next prime is 51135401557. The reversal of 51135401532 is 23510453115.

It is an interprime number because it is at equal distance from previous prime (51135401507) and next prime (51135401557).

It is a super-3 number, since 3×51135401532³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 51135401532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4315873 + ... + 4327704.

It is an arithmetic number, because the mean of its divisors is an integer number (2722727070).

Almost surely, 2^51135401532 is an apocalyptic number.

It is an amenable number.

51135401532 is an abundant number, since it is smaller than the sum of its proper divisors (79555497828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51135401532 is a wasteful number, since it uses less digits than its factorization.

51135401532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8643630 (or 8643628 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 51135401532 its reverse (23510453115), we get a palindrome (74645854647).

The spelling of 51135401532 in words is "fifty-one billion, one hundred thirty-five million, four hundred one thousand, five hundred thirty-two".